YANG Yue,ZHANG Xieyu,ZHANG Xinwen,et al.Effects of Qingre Huoxue Formulation (清热活血方) on H3K18 Lactylation and the JAK2/STAT3 Signaling Pathway in Rats with Collagen-Induced Arthritis[J].Journal of Traditional Chinese Medicine,2025,66(19):2045-2051.
YANG Yue,ZHANG Xieyu,ZHANG Xinwen,et al.Effects of Qingre Huoxue Formulation (清热活血方) on H3K18 Lactylation and the JAK2/STAT3 Signaling Pathway in Rats with Collagen-Induced Arthritis[J].Journal of Traditional Chinese Medicine,2025,66(19):2045-2051.DOI: 10.13288/j.11-2166/r.2025.19.013.
Effects of Qingre Huoxue Formulation (清热活血方) on H3K18 Lactylation and the JAK2/STAT3 Signaling Pathway in Rats with Collagen-Induced Arthritis增强出版
(清热活血方, QHF) in the treatment of rheumatoid arthritis, focusing on histone H3 lysine 18 lactylation (H3K18la) and the janus kinase 2/signal transducer and activator of transcription 3 (JAK2/STAT3) signaling pathway.
Methods
2
Twenty-four male Sprague-Dawley rats were randomly divided into control group, model group, QHF group, and methotrexate (MTX) with 6 rats in each group. Except for the control group, rats were immunized with bovine type Ⅱ collagen emulsified with incomplete Freund's adjuvant to establish a collagen-induced arthritis (CIA) model. From day 1 of modeling, the QHF group received intragastric administration of 20 g/(kg·d) once daily; the MTX group received intragastric administration of MTX suspension 1 mg/kg weekly on Tuesdays and Thursdays; the control group, model group, and MTX group on non-MTX days were given normal saline 10 ml/(kg·d) once daily. All interventions lasted for 4 weeks. Arthritis index (AI) scores were assessed on days 6, 10, 14, 18, and 22 after the second immunization. After the final gavage, synovial and ankle joint tissues were collected for hematoxylin-eosin (HE) staining to observe pathological changes. Serum C-reactive protein (CRP) and interleukin-17 (IL-17) levels were measured by ELISA; lactate levels in synovium were determined by a micro-method; H3K18la levels in synovial tissue were detected by co-immunoprecipitation and Western Blot; and phosphorylated JAK2 (P-JAK2) and phospho-rylated STAT3 (P-STAT3) expression in ankle joints was measured by Western Blot.
Results
2
In the control group, synovial cells were well organized and morphologically normal without angiogenesis. In the model group, synovial cells were disordered with abnormal structure, angiogenesis, and massive inflammatory infiltration. Compared with the control group, AI scores, CRP, IL-17, lactate, H3K18la, and P-JAK2/P-STAT3 levels were significantly increased (
P
<0.01). Compared with the model group, both the QHF and MTX groups showed alleviated inflammatory damage in synovial and joint pathology, with significantly reduced AI scores, CRP, IL-17, lactate, H3K18la, and P-JAK2/P-STAT3 protein levels (
P
<0.05 or
P
<0.01). No significant differences were found between the QHF and MTX groups across the above indices (
P
>0.05).
Conclusion
2
QHF may alleviate inflammation in CIA rats by regulating lactate content, downregulating H3K18la, and inhibiting the JAK2/STAT3 signaling pathway.
关键词
Keywords
references
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